package com.example.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.reggie.common.R;
import com.example.reggie.dto.DishDto;
import com.example.reggie.entity.Category;
import com.example.reggie.entity.Dish;
import com.example.reggie.entity.DishFlavor;
import com.example.reggie.mapper.DishMapper;
import com.example.reggie.service.CategoryService;
import com.example.reggie.service.DishFlavorService;
import com.example.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理某个分类下的缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("添加菜品成功");
    }

    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("name= {}", name);

        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);
//        dishMapper.selectPage(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品和菜品口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> getById(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        dishService.updateByIdWithFlavor(dishDto);

        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);
        //清理某个分类下的缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);


        return R.success("修改菜品成功");
    }

    /*@GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //查询售卖情况， 1为启售
        lqw.eq(Dish::getStatus, 1);
        lqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(lqw);
        return R.success(list);
    }*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();   //dish_321310303_1

        //先从redis中获取数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null){
            //数据存在，直接返回
            return R.success(dishDtoList);
        }

        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //查询售卖情况， 1为启售
        lqw.eq(Dish::getStatus, 1);
        lqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(lqw);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String name = category.getName();
                dishDto.setCategoryName(name);
            }
            //当前菜品id
            Long dishIds = item.getId();
            LambdaQueryWrapper<DishFlavor> lqw1 = new LambdaQueryWrapper<>();
            lqw1.eq(DishFlavor::getDishId, dishIds);
            List<DishFlavor> dishFlavors = dishFlavorService.list(lqw1);
            dishDto.setFlavors(dishFlavors);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将数据缓存到redis中
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }

    /**
     * 停售
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable int status, @RequestParam List<Long> ids){
        log.info("dish:{},dis:{}", status,ids);
        LambdaQueryWrapper<Dish> lqw =new LambdaQueryWrapper<>();
        lqw.in(ids != null, Dish::getId, ids);
        lqw.orderByDesc(Dish::getUpdateTime);
        Dish dish = new Dish();
        dish.setStatus(status);
        dishService.update(dish,lqw);
        return R.success("操作成功");
    }

    /**
     * 删除
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> deleteByIds(@RequestParam List<Long> ids){
        dishService.deleteWithFlavor(ids);
        return R.success("删除成功");
    }

}
